The results for Side 2 are presented in Figure 3. This figure shows the median of flux ratios over 20 Å bins centered on 1200 Å, 1500 Å, 2000 Å, 2500 Å, and 3000 Å (from top to bottom). The ratios are referenced to the observations taken on SMS 94120. The observed star was BD+28D4211. Five data points are in each panel, except in the 1200 Å panel, for which no data were obtained on SMS 95123 (see above).
Side 2 sensitivity during Cycle 4. The five panels are for central wavelengths of 1200 Å, 1500 Å, 2000 Å, 2500 Å, and 3000 Å. Each point represents ratio of the median counts measured over 20 Å relative to the counts measured on SMS 94120 over the same 20 Å (the first data point).
Also included in this figure are the epochs of two secondary mirror moves. The mirror moves are not expected to affect the PSF seen by the GHRS significantly. This is consistent with the results of Figure 3. The errors of each individual data point are within 1%. Side 2 of the GHRS has experienced a slight sensitivity decrease by about 2% over one year since the beginning of Cycle 4. This trend is present at all five wavelength points. The decrease is somewhat above the 1 sigma error of an individual data point.